Tag Archives: PPDIOO

CCDA Notes – PPDIOO

This starts my foray into the CCDA. I will try to keep the CCDA notes blog posts to a specific topic per post. If you see any mistakes, missed subject matter, or just wish to berate my note taking skills then feel free to leave a comment.

PPDIOO
Prepare
Plan
Design
Implement
Operate
Optimize

Prepare
1) Business objectives. Identify technologies and develop a strategy.
2) Identify customer requirements.
    a) Speak with all managers.
    b) Follow these steps:
     Step 1. Identify network applications and services.
     Step 2. Define organizational goals.
     Step 3. Define organizational constraints.
     Step 4. Define technical goals.
     Step 5. Define technical constraints.

Plan
1) Characterize and asses the network to develop a project plan.
2) Information gathering.
    Step 1. Identify and gather all existing documentation.
    Step 2. Audit the network.
    Step 3. Perform traffic analysis.
3) Information to gather:
    a) Device list
    b) Hardware models
    c) Software versions
    d) Configs
    e) Auditing tools output
    f) Interface speeds
    g) Link, cpu, and memory utilization
    h) WAN technologies

Design
1) Top Down Approach
    a) Start with apps and work your way down to the network infrastructure.
    b) Accurately incorporates the business drivers.
    c) Disadvantage is that it is time-consuming.
2) Bottom Up Approach
    a) Based on previous experience.
    b) Allows for quick solutions.
    c) Might make for inappropriate solutions.
    d) Often misses the organizational goals.
3) Pilots and prototypes
    a) Prototype – A subset of a full network. These networks are generally isolated from production network.
    b) Pilot – A live location for testing on the actual network. Allows the discovery of any real issues.
4) A design document generally includes:
    a) Introduction
    b) Design requirements
    c) Existing network infrastructure
    d) Design
    e) PoC
    f) Implementation plan
    g) Appendices

Implement
1) Follow the project plan and design document.
2) Each step should include:
    a) Description
    b) Implementation guidelines
    c) Estimated time to complete
    d) Rollback steps
    e) Reference information

Operate
1) Network management
2) Network monitoring
3) Routine maintenance
4) Upgrades
5) Performance management
6) Network fault detection and correction

Optimize
1) Be proactive instead of reactive
2) This may lead back to the Prepare phase and start the process all over.

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